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if_le_ibus.c revision 1.3 
      1 /*	$NetBSD: if_le_ibus.c,v 1.3 2002/01/08 17:10:28 chs Exp $	*/
      2 
      3 /*
      4  * Copyright 1996 The Board of Trustees of The Leland Stanford
      5  * Junior University. All Rights Reserved.
      6  *
      7  * Permission to use, copy, modify, and distribute this
      8  * software and its documentation for any purpose and without
      9  * fee is hereby granted, provided that the above copyright
     10  * notice appear in all copies.  Stanford University
     11  * makes no representations about the suitability of this
     12  * software for any purpose.  It is provided "as is" without
     13  * express or implied warranty.
     14  *
     15  * This driver was contributed by Jonathan Stone.
     16  */
     17 
     18 /*
     19  * LANCE on Decstation kn01/kn220(?) baseboard.
     20  */
     21 #include "opt_inet.h"
     22 
     23 #include <sys/param.h>
     24 #include <sys/socket.h>
     25 #include <sys/systm.h>
     26 
     27 #include <net/if.h>
     28 #include <net/if_ether.h>
     29 #include <net/if_media.h>
     30 
     31 #ifdef INET
     32 #include <netinet/in.h>
     33 #include <netinet/if_inarp.h>
     34 #endif
     35 
     36 #include <dev/ic/lancevar.h>
     37 #include <dev/ic/am7990var.h>
     38 
     39 #include <dev/tc/if_levar.h>
     40 #include <pmax/ibus/ibusvar.h>
     41 #include <pmax/pmax/kn01.h>
     42 
     43 static void le_dec_copyfrombuf_gap2(struct lance_softc *, void *, int, int);
     44 static void le_dec_copytobuf_gap2(struct lance_softc *, void *, int, int);
     45 static void le_dec_zerobuf_gap2(struct lance_softc *, int, int);
     46 
     47 
     48 static int le_pmax_match(struct device *, struct cfdata *, void *);
     49 static void le_pmax_attach(struct device *, struct device *, void *);
     50 
     51 struct cfattach le_pmax_ca = {
     52 	sizeof(struct le_softc), le_pmax_match, le_pmax_attach
     53 };
     54 extern struct cfdriver ibus_cd;
     55 
     56 int
     57 le_pmax_match(struct device *parent, struct cfdata *match, void *aux)
     58 {
     59 	struct ibus_attach_args *d = aux;
     60 
     61 	if (parent->dv_cfdata->cf_driver != &ibus_cd)
     62 		return (0);
     63 
     64 	if (strcmp("lance", d->ia_name) != 0)
     65 		return (0);
     66 	return (1);
     67 }
     68 
     69 void
     70 le_pmax_attach(struct device *parent, struct device *self, void *aux)
     71 {
     72 	struct le_softc *lesc = (void *)self;
     73 	struct lance_softc *sc = &lesc->sc_am7990.lsc;
     74 	u_char *cp;
     75 	struct ibus_attach_args *ia = aux;
     76 
     77 	/*
     78 	 * It's on the baseboard, with a dedicated interrupt line.
     79 	 */
     80 	lesc->sc_r1 = (struct lereg1 *)(ia->ia_addr);
     81 	sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(KN01_SYS_LANCE_B_START);
     82 	cp = (u_char *)(MIPS_PHYS_TO_KSEG1(KN01_SYS_CLOCK) + 1);
     83 
     84 	sc->sc_copytodesc = le_dec_copytobuf_gap2;
     85 	sc->sc_copyfromdesc = le_dec_copyfrombuf_gap2;
     86 	sc->sc_copytobuf = le_dec_copytobuf_gap2;
     87 	sc->sc_copyfrombuf = le_dec_copyfrombuf_gap2;
     88 	sc->sc_zerobuf = le_dec_zerobuf_gap2;
     89 
     90 	dec_le_common_attach(&lesc->sc_am7990, cp);
     91 
     92 	ibus_intr_establish(parent, (void*)ia->ia_cookie, IPL_NET,
     93 	    am7990_intr, sc);
     94 }
     95 
     96 /*
     97  * gap2: two bytes of data followed by two bytes of pad.
     98  *
     99  * Buffers must be 4-byte aligned.  The code doesn't worry about
    100  * doing an extra byte.
    101  */
    102 
    103 void
    104 le_dec_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len)
    105 {
    106 	volatile caddr_t buf = sc->sc_mem;
    107 	caddr_t from = fromv;
    108 	volatile u_int16_t *bptr;
    109 
    110 	if (boff & 0x1) {
    111 		/* handle unaligned first byte */
    112 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    113 		*bptr = (*from++ << 8) | (*bptr & 0xff);
    114 		bptr += 2;
    115 		len--;
    116 	} else
    117 		bptr = ((volatile u_int16_t *)buf) + boff;
    118 	while (len > 1) {
    119 		*bptr = (from[1] << 8) | (from[0] & 0xff);
    120 		bptr += 2;
    121 		from += 2;
    122 		len -= 2;
    123 	}
    124 	if (len == 1)
    125 		*bptr = (u_int16_t)*from;
    126 }
    127 
    128 void
    129 le_dec_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len)
    130 {
    131 	volatile caddr_t buf = sc->sc_mem;
    132 	caddr_t to = tov;
    133 	volatile u_int16_t *bptr;
    134 	u_int16_t tmp;
    135 
    136 	if (boff & 0x1) {
    137 		/* handle unaligned first byte */
    138 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    139 		*to++ = (*bptr >> 8) & 0xff;
    140 		bptr += 2;
    141 		len--;
    142 	} else
    143 		bptr = ((volatile u_int16_t *)buf) + boff;
    144 	while (len > 1) {
    145 		tmp = *bptr;
    146 		*to++ = tmp & 0xff;
    147 		*to++ = (tmp >> 8) & 0xff;
    148 		bptr += 2;
    149 		len -= 2;
    150 	}
    151 	if (len == 1)
    152 		*to = *bptr & 0xff;
    153 }
    154 
    155 static void
    156 le_dec_zerobuf_gap2(struct lance_softc *sc, int boff, int len)
    157 {
    158 	volatile caddr_t buf = sc->sc_mem;
    159 	volatile u_int16_t *bptr;
    160 
    161 	if ((unsigned)boff & 0x1) {
    162 		bptr = ((volatile u_int16_t *)buf) + (boff - 1);
    163 		*bptr &= 0xff;
    164 		bptr += 2;
    165 		len--;
    166 	} else
    167 		bptr = ((volatile u_int16_t *)buf) + boff;
    168 	while (len > 0) {
    169 		*bptr = 0;
    170 		bptr += 2;
    171 		len -= 2;
    172 	}
    173 }
    174